Question: In the episode 1009 Mystery of the Urinal Deuce we get to know that Cartman believes 9/11 was a conspiracy. At the end, Stan and Kyle got to know the real truth, but Cartman didn't. Why would he think that new guy is a terrorist, if he believes that 9/11 was a conspiracy by the U.S. government?

The creators of the show, Matt Stone and Trey Parker, based the Stan Marsh and Kyle Brosfloski characters after themselves (Stan being Parker and Kyle being Stone.) The Eric Cartman character was partly based on Archie Bunker.